CustomSoftwareSerial

Alternative SoftwareSerial in Arduino. CustomSoftwareSerial library allow you configure and custom parity bit, stop bits and number of data bits. Hope it useful for you.

You can download from v1.0.tar.gz or v1.0.zip

Install

After downloading the package, follow step in http://www.arduino.cc/en/guide/libraries

Quick tutorial

Simple demo to use CustomSoftwareSerial

#include <CustomSoftwareSerial.h>

CustomSoftwareSerial* customSerial;               // Declare serial

// Init value
void setup() {
  Serial.begin(57600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.write("Hello World");

  customSerial = new CustomSoftwareSerial(9, 10); // rx, tx
  customSerial->begin(9600, CSERIAL_8N1);         // Baud rate: 9600, configuration: CSERIAL_8N1
  customSerial->write("Test message");            // Write testing data
}

void loop() {
  if (customSerial->available())
    Serial.write(customSerial->read());
  if (Serial.available())
    customSerial->write(Serial.read());

  delay(1000);
}

Supported Configuration

We support configurations to setup stop bit, parity bit and number of data bits:

Name	Number of data bits	Parity bit	Number of stop bit
CSERIAL_5N1	5	None	1
CSERIAL_6N1	6	None	1
CSERIAL_7N1	7	None	1
CSERIAL_8N1	8	None	1
CSERIAL_5N2	5	None	2
CSERIAL_6N2	6	None	2
CSERIAL_7N2	7	None	2
CSERIAL_8N2	8	None	2
CSERIAL_5O1	5	Odd	1
CSERIAL_6O1	6	Odd	1
CSERIAL_7O1	7	Odd	1
CSERIAL_8O1	8	Odd	1
CSERIAL_5O2	5	Odd	2
CSERIAL_6O2	6	Odd	2
CSERIAL_7O2	7	Odd	2
CSERIAL_8O2	8	Odd	2
CSERIAL_5E1	5	Even	1
CSERIAL_6E1	6	Even	1
CSERIAL_7E1	7	Even	1
CSERIAL_8E1	8	Even	1
CSERIAL_5E2	5	Even	2
CSERIAL_6E2	6	Even	2
CSERIAL_7E2	7	Even	2
CSERIAL_8E2	8	Even	2

Testing

Test Configuration

Testing demo to test configuration's values

#include <CustomSoftwareSerial.h>

CustomSoftwareSerial* customSerial;

void setup() {
  Serial.begin(9600);
  
  Serial.println("**** DEFAULT ****");
  customSerial = new CustomSoftwareSerial(9, 10);
  printPort();
  
  Serial.println("**** CSERIAL_5N1 ****");
  customSerial->begin(1200, CSERIAL_5N1);
  printPort();
  
  Serial.println("**** CSERIAL_6N1 ****");
  customSerial->begin(1200, CSERIAL_6N1);
  printPort();
  
  Serial.println("**** CSERIAL_7N1 ****");
  customSerial->begin(1200, CSERIAL_7N1);
  printPort();
  
  Serial.println("**** CSERIAL_8N1 ****");
  customSerial->begin(1200, CSERIAL_8N1);
  printPort();
  
  Serial.println("**** CSERIAL_5N2 ****");
  customSerial->begin(1200, CSERIAL_5N2);
  printPort();
  
  Serial.println("**** CSERIAL_6N2 ****");
  customSerial->begin(1200, CSERIAL_6N2);
  printPort();
  
  Serial.println("**** CSERIAL_7N2 ****");
  customSerial->begin(1200, CSERIAL_7N2);
  printPort();
  
  Serial.println("**** CSERIAL_8N2 ****");
  customSerial->begin(1200, CSERIAL_8N2);
  printPort();
  
  Serial.println("**** CSERIAL_5O1 ****");
  customSerial->begin(1200, CSERIAL_5O1);
  printPort();
  
  Serial.println("**** CSERIAL_6O1 ****");
  customSerial->begin(1200, CSERIAL_6O1);
  printPort();
  
  Serial.println("**** CSERIAL_7O1 ****");
  customSerial->begin(1200, CSERIAL_7O1);
  printPort();
  
  Serial.println("**** CSERIAL_8O1 ****");
  customSerial->begin(1200, CSERIAL_8O1);
  printPort();
  
  Serial.println("**** CSERIAL_5O2 ****");
  customSerial->begin(1200, CSERIAL_5O2);
  printPort();
  
  Serial.println("**** CSERIAL_6O2 ****");
  customSerial->begin(1200, CSERIAL_6O2);
  printPort();
  
  Serial.println("**** CSERIAL_7O2 ****");
  customSerial->begin(1200, CSERIAL_7O2);
  printPort();
  
  Serial.println("**** CSERIAL_8O2 ****");
  customSerial->begin(1200, CSERIAL_8O2);
  printPort();
  
  Serial.println("**** CSERIAL_5E1 ****");
  customSerial->begin(1200, CSERIAL_8O2);
  printPort();
  
  Serial.println("**** CSERIAL_6E1 ****");
  customSerial->begin(1200, CSERIAL_6E1);
  printPort();
  
  Serial.println("**** CSERIAL_7E1 ****");
  customSerial->begin(1200, CSERIAL_7E1);
  printPort();
  
  Serial.println("**** CSERIAL_8E1 ****");
  customSerial->begin(1200, CSERIAL_8E1);
  printPort();
  
  Serial.println("**** CSERIAL_5E2 ****");
  customSerial->begin(1200, CSERIAL_5E2);
  printPort();
  
  Serial.println("**** CSERIAL_6E2 ****");
  customSerial->begin(1200, CSERIAL_6E2);
  printPort();
  
  Serial.println("**** CSERIAL_7E2 ****");
  customSerial->begin(1200, CSERIAL_7E2);
  printPort();
  
  Serial.println("**** CSERIAL_8E2 ****");
  customSerial->begin(1200, CSERIAL_8E2);
  printPort();  
}

void loop() {
  
}

void printPort() {
  Serial.println("Port's information of CustomSoftwareSerial");

  Serial.print("- Number of data bit: ");
  Serial.println(customSerial->getNumberOfDataBit());
  
  Parity parity = customSerial->getParity();
  char* parityText;
  switch(parity) {
    case NONE:
      parityText = "None";
      break;
    case ODD:
      parityText = "Odd";
      break;
    case EVEN:
      parityText = "Even";
      break;
  }
  Serial.print("- Parity bit: ");
  Serial.println(parityText);
  
  
  Serial.print("- Number of stop bit: ");
  Serial.println(customSerial->getNumberOfStopBit());

  Serial.println("");
}

Little story

A sunny day, I implement an library to control BLE HM-10 module through serial port but I recognize the Arduino's SoftwareSerial doesn't support parity bit. The stop bit only support one. So, I create and share this project for someone who need it.

If you got any problem or question, let me know. Thanks